Hi George,
The Holley/Weber is Tom Langdon's recommended carb for a single carb application on a 235. A pair of Carter/Weber's are his recommendation on a dual setup on a 235. The Holley is a higher CFM carb and you'll find guys running them in pairs on the warmed up 261's.
My 235 has been bored, dynamically balanced, had some head work and has a split Fenton setup...I cammed it for low-end torque. I can cruise effortlessly at 70 mph at 2000 rpm's in 5th gear and drop down to 50 mph and accelerate without a downshift. (.72 OD, 3.42 R&P, 28" tire dia). I was running close to 20 mpg in my old 235 with a single H/W and expect to better that after my run-in period.
The best part of a conversion is that it's a relatively simple bolt-on. On the single H/W, I cut off the 90 degree bend at the top of the vertical rod off the bellcrank, added some fine threads and screwed on his included rod end. The stock carb studs are too long and he includes shorter studs. With the H/W I bought his 12v electric choke conversion, adjusted my idle, tweaked the single idle adjustment screw (which was about 1/8 turn) and she was good-to-go! His $65.00 H/W is a rebuilt but I heard you could get a new one from him for an additional $10. The whole setup ran me about $125. and I also bought his spun-aluminum breather kit which was a bit pricey at $45.00.
The dual Carter/Weber setup with adaptors, linkage kit, carbs, included 12v electric chokes, which I put on an Offy intake, were also simple bolt-ons. However, getting the linkage tweaked took some time. I'm running exhaust heat (he recommends water heat) which uses his heat plate and the back corner needs to be trimmed a little for additional linkage movement. The Offy intake will leak water unless the core holes on the bottom are welded up. The exhaust heat works great and the performance was once again, near-perfect right out of the box. I've got pictures of the process in my webshots "shoebox" and also in the "tips and tricks" album.
After struggling with the stock "R" carb with it's tendency to need adjustment, hesitation, and the smell of gas in the cab I would HIGHLY recommend either the H/W or the C/W setups. You won't be disappointed! Just Drive!
Dave
